ChatGPT: Millions of American men take finasteride for hair loss

ChatGPT is right: it is challenging to estimate the number of men taking finasteride for hair loss. The popular AI service starts with the number of American men with hair loss: 50 million. It then estimates that 5–10% of them take the drug. This produces an estimate of 2.5 to 5 million American men taking finasteride for hair loss.

Here is ChatGPT’s full response to the question, “How many American men take Propecia for hair loss?”

Determining the exact number of American men taking Propecia (finasteride) for hair loss can be challenging due to the lack of publicly available, specific prescription data. However, we can make an informed estimate based on available information.

1. Prevalence of Hair Loss: Male pattern baldness (androgenetic alopecia) affects approximately 50 million men in the United States.

2. Propecia Usage Rates: Studies and market research suggest that a significant portion of men with male pattern baldness consider or use treatments. While not all men with hair loss use Propecia, it is one of the more popular treatments.

3. Prescription Data: Based on available market data and surveys, it’s estimated that around 5-10% of men with male pattern baldness use prescription treatments like Propecia.

Using these estimates, we can calculate a rough figure:

If 5-10% of the 50 million men with male pattern baldness use Propecia, that would be between 2.5 million and 5 million men.

Therefore, approximately 2.5 to 5 million American men are estimated to be taking Propecia for hair loss.

Telehealth companies like Hims and Keeps, which invest heavily in marketing, may be boosting the percentage of men with hair loss taking up finasteride, but this is not mentioned.